Hi guys, I have a dedicated server for Counter Strike, sure you know the game, but my problem is not the game, is about the security of the server.
Today I noticed that my server is under a kind of flood attacks over udp ports, but this not causing high traffic in network bandwith or server resources like CPU or RAM. Otherwise the ports used by the game server have many packets connects at the same time, more than 1000 and that cause high ping response for server status querys.
This is the netstat output:
udp 5888 0 192.168.0.100:15811 0.0.0.0:*
udp 3680 0 192.168.0.100:15816 0.0.0.0:*
How I can prevent this with iptables? What is the exactly steaps to prevent against this kind of attack? Thanks in adavance